Diffusers in public ordinary rooms

Emma Arvidsson, Delphine Bard, Erling Nilsson, Ola Karlsson

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

Traditionally, the room acoustic properties in an ordinary public room are defined by only one parameter, the reverberation time. However, research has showed that additional room acoustic parameters as sound strength and speech clarity are necessary to consider in order to achieve good acoustic conditions. In a room with acoustical ceiling treatment the effects of furniture and interiors on the room acoustic parameters are significant. In addition, by using diffusers with directional properties it is possible to individually control the room acoustic parameters. Room acoustical measurements have been carried out in a reverberation chamber with suspended absorbing ceiling and directional diffusing objects. The effect of different diffuser configurations has been examined regarding reverberation time, speech clarity and sound strength. The evaluation shows that the orientation and the amount of the diffusing elements have a significant influence on the room acoustic parameters and can be used to fine-tune the acoustical conditions in public ordinary rooms with an existing acoustic ceiling treatment. This paper presents a study showing how diffusers can be used to contribute to an improved sound environment in public ordinary rooms with an acoustic ceiling.

Original languageEnglish
Title of host publicationInterNoise 19, Madrid, Spain
EditorsAntonio Calvo-Manzano, Ana Delgado, Antonio Perez-Lopez, Jose Salvador Santiago
PublisherInstitute of Noise Control Engineering
Pages5453-5461
Number of pages9
ISBN (Electronic)9788487985317
Publication statusPublished - 2019 Sept 30
Event48th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2019 MADRID - Madrid, Spain
Duration: 2019 Jun 162019 Jun 19

Publication series

NameINTER-NOISE and NOISE-CON Congress and Conference Proceedings
PublisherInstitute of Noise Control Engineering

Conference

Conference48th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2019 MADRID
Country/TerritorySpain
CityMadrid
Period2019/06/162019/06/19

Subject classification (UKÄ)

  • Fluid Mechanics and Acoustics

Free keywords

  • Diffusers
  • Reverberation time
  • Speech clarity

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